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            <div><h3 class="title">
                <a name="asio.reference.Protocol"></a><a class="link" href="Protocol.html"
                                                         title="Protocol requirements">Protocol requirements</a>
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    <p>
        A type <code class="computeroutput"><span class="identifier">X</span></code> meets the <code
            class="computeroutput"><span class="identifier">Protocol</span></code> requirements if it satisfies the
        requirements of <code class="computeroutput"><span class="identifier">Destructible</span></code>
        (C++Std [destructible]), <code class="computeroutput"><span class="identifier">CopyConstructible</span></code>
        (C++Std [copyconstructible]), and <code class="computeroutput"><span
            class="identifier">CopyAssignable</span></code>
        (C++Std [copyassignable]), as well as the additional requirements listed
        below.
    </p>
    <p>
        No copy or move operation of the type <code class="computeroutput"><span class="identifier">X</span></code>
        shall exit via an exception.
    </p>
    <div class="table">
        <a name="asio.reference.Protocol.t0"></a>
        <p class="title"><b>Table 25. Protocol requirements</b></p>
        <div class="table-contents">
            <table class="table" summary="Protocol requirements">
                <colgroup>
                    <col>
                    <col>
                    <col>
                </colgroup>
                <thead>
                <tr>
                    <th>
                        <p>
                            expression
                        </p>
                    </th>
                    <th>
                        <p>
                            return type
                        </p>
                    </th>
                    <th>
                        <p>
                            assertion/note<br> pre/post-conditions
                        </p>
                    </th>
                </tr>
                </thead>
                <tbody>
                <tr>
                    <td>
                        <p>
                            <code class="computeroutput"><span class="identifier">X</span><span
                                    class="special">::</span><span class="identifier">endpoint</span></code>
                        </p>
                    </td>
                    <td>
                        <p>
                            type meeting <a class="link" href="Endpoint.html" title="Endpoint requirements">endpoint</a>
                            requirements
                        </p>
                    </td>
                    <td>
                    </td>
                </tr>
                </tbody>
            </table>
        </div>
    </div>
    <br class="table-break">
    <p>
        In the table below, <code class="computeroutput"><span class="identifier">a</span></code> denotes
        a (possibly const) value of type <code class="computeroutput"><span class="identifier">X</span></code>.
    </p>
    <div class="table">
        <a name="asio.reference.Protocol.t1"></a>
        <p class="title"><b>Table 26. Protocol requirements for extensible implementations</b></p>
        <div class="table-contents">
            <table class="table" summary="Protocol requirements for extensible implementations">
                <colgroup>
                    <col>
                    <col>
                    <col>
                </colgroup>
                <thead>
                <tr>
                    <th>
                        <p>
                            expression
                        </p>
                    </th>
                    <th>
                        <p>
                            return type
                        </p>
                    </th>
                    <th>
                        <p>
                            assertion/note<br> pre/post-conditions
                        </p>
                    </th>
                </tr>
                </thead>
                <tbody>
                <tr>
                    <td>
                        <p>
                            <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span
                                    class="identifier">family</span><span class="special">()</span></code>
                        </p>
                    </td>
                    <td>
                        <p>
                            <code class="computeroutput"><span class="keyword">int</span></code>
                        </p>
                    </td>
                    <td>
                        <p>
                            Returns a value suitable for passing as the <span class="emphasis"><em>domain</em></span>
                            argument to <span class="emphasis"><em>POSIX</em></span> <a
                                href="http://www.opengroup.org/onlinepubs/9699919799/functions/socket.html"
                                target="_top"><code class="computeroutput"><span class="identifier">socket</span><span
                                class="special">()</span></code></a>
                            (or equivalent).
                        </p>
                    </td>
                </tr>
                <tr>
                    <td>
                        <p>
                            <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span
                                    class="identifier">type</span><span class="special">()</span></code>
                        </p>
                    </td>
                    <td>
                        <p>
                            <code class="computeroutput"><span class="keyword">int</span></code>
                        </p>
                    </td>
                    <td>
                        <p>
                            Returns a value suitable for passing as the <span class="emphasis"><em>type</em></span>
                            argument to <span class="emphasis"><em>POSIX</em></span> <a
                                href="http://www.opengroup.org/onlinepubs/9699919799/functions/socket.html"
                                target="_top"><code class="computeroutput"><span class="identifier">socket</span><span
                                class="special">()</span></code></a>
                            (or equivalent).
                        </p>
                    </td>
                </tr>
                <tr>
                    <td>
                        <p>
                            <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span
                                    class="identifier">protocol</span><span class="special">()</span></code>
                        </p>
                    </td>
                    <td>
                        <p>
                            <code class="computeroutput"><span class="keyword">int</span></code>
                        </p>
                    </td>
                    <td>
                        <p>
                            Returns a value suitable for passing as the <span class="emphasis"><em>protocol</em></span>
                            argument to <span class="emphasis"><em>POSIX</em></span> <a
                                href="http://www.opengroup.org/onlinepubs/9699919799/functions/socket.html"
                                target="_top"><code class="computeroutput"><span class="identifier">socket</span><span
                                class="special">()</span></code></a>
                            (or equivalent).
                        </p>
                    </td>
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            <div class="copyright-footer">Copyright © 2003-2022 Christopher M. Kohlhoff<p>
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